B023A

HVAC Actuators Supply Voltage

Severity

⚠️ Medium

Can you drive?

Yes, but get it checked soon

Approx. repair cost

$22–111 (est.)

Symptoms

Incorrect operation of the climate control system
Lack of response to changes in temperature settings or air flow direction
HVAC dampers do not move

Causes

Open or short circuit in HVAC drive harness
Malfunction of the relay or fuse of the drive power supply circuit
Problems with the HVAC control unit
Failure of one or more damper actuators

How to Fix

Check the fuse and relay of the HVAC drives power supply circuit
Inspect the wiring harness for damage
Check the voltage at the drive connectors
Test the operation of each drive using a diagnostic scanner
Replace faulty components

Related codes

B0238 B0239 B023B